1. (a.) Existing only in imagination; fanciful; imaginary; not real; chimerical.

2. (a.) Having the nature of a phantom; unreal.

3. (a.) Indulging the vagaries of imagination; whimsical; full of absurd fancies; capricious; as, fantastic minds; a fantastic mistress.

4. (a.) Resembling fantasies in irregularity, caprice, or eccentricity; irregular; oddly shaped; grotesque.

5. (n.) A person given to fantastic dress, manners, etc.; an eccentric person; a fop.

Barmecidal Barmecide Gothic absurd adroit airy alien antic appalling apparent apparitional arbitrary astonishing autistic balmy baroque beguiling bewildering beyond belief bizarre brain-born capricious chimeric chimerical clever cockamamie concocted conspicuous cooked-up cracking cranky crazy crotchety deceptive delusional delusionary delusive delusory dereistic dream-built dreamlike dreamy eccentric egregious enigmatic erratic erroneous exceptional exotic extraordinary extravagant fabricated fabulous fallacious FALSE fancied fanciful fancy-born fancy-built fancy-woven fantasied fantasque fascinating fictional fictitious fictive figmental flaky florid foolish forged formidable freakish great grotesque harebrained hatched high-flown humorsome illusional illusionary illusive illusory imaginary imagined implausible impossible incomprehensible inconceivable incredible ingenious insane invented irrational kinky laughable legendary loony ludicrous made-up maggoty manufactured marked marvelous massive miraculous misleading monstrous monumental moody mortal motiveless mythical nonsensical notable noteworthy noticeable notional odd of mark ostensible outlandish outrageous outre outstanding overwhelming passing strange peculiar petulant phantasmagoric phantasmal phantom phenomenal poppycockish preposterous prodigious put-up puzzling quaint queer quirky rare remarkable ridiculous rococo seeming self-deceptive self-deluding sensational signal silly singular specious spectacular spectral splendid strange striking stupendous superior supposititious temperamental terrific towering tremendous trumped-up unaccountable unactual unbelievable uncommon unearthly unexpected unfounded unheard-of unimaginable unique unlikely unprecedented unreal unrealistic unreasonable unrestrained unsubstantial vagarious vagrant visionary wacky wanton wayward weird whimsical wild wonderful wondrous